Vinyl-terminated polyesters and polycarbonates for flexibilizing and improving the toughness of compositions from unsaturated polyesters and fiber reinforced plastics made from them
US5342554A · kind A · utility
15Cited by
40References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1993 |
| Grant date | Aug 30, 1994 |
| Priority date | — |
| Expiry date | Jan 7, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L63/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Vinyl-terminated polyesters and vinyl-terminated aliphatic polycarbonates are described which improve the flexibility and elongation at failure of cured samples of unsaturated polyesters or vinyl ester resins both at room temperature and at high temperatures, and without significant loss of surface quality or other mechanical properties. Further, these polymers do not phase separate from uncured polyester resin/styrene solutions, do not significantly increase the initial viscosity of molding compositions in which they have been incorporated, and do not negate the effect of low shrinkage additives during cure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.